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Appalm/src/vidclr.asm
David Schmenk 8d4cade6f0 Initial check-in
2019-04-21 06:53:32 -07:00

817 lines
18 KiB
NASM
Executable File
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#define SRC %a0
#define DST %a1
#define PIXPAIR %a2
#define FONTBASE %a2
#define FONT %a2
#define CLR16BASE %a2
#define ASRC %a3
#define PIXPAIREVENTABLE %a3
#define PIXMONOLOTABLE %a3
#define ACACHE %a4
#define PIXPAIRODDTABLE %a4
#define PIXMONOHITABLE %a4
#define CACHE %a6
#define DSTDBL %a6
#define BITMASK %d0
#define PREFETCH %d1
#define VCHAR %d1
#define HCOUNT %d2
#define VCOUNT %d3
#define DATA %d6
#define DATALO %d6
#define MSBOFFSET %d7
#define DATAHI %d7
.text
.even
/*
* Update a single HiRes scanline.
*/
.global gryUpdateHiresScanline
gryUpdateHiresScanline:
movm.l #0x133A, -(%sp)
move.l (28+4)(%sp), SRC
move.l (28+8)(%sp), DST
move.l HRMonoLo@END.w(%a5), PIXMONOLOTABLE
move.l HRMonoHi@END.w(%a5), PIXMONOHITABLE
clr.w DATAHI
move.w #19, HCOUNT
gryscanloop:
move.w (SRC)+, DATALO
and.w #0x7F7F, DATALO
move.b DATALO, DATAHI
lsr.w #8, DATALO
move.b (PIXMONOLOTABLE,DATALO.w), BITMASK
move.b DATAHI, PREFETCH
not.b PREFETCH
and.b #0x01, PREFETCH
or.b PREFETCH, BITMASK
lsl.w #8, BITMASK
move.b (PIXMONOHITABLE,DATAHI.w), BITMASK
not.b DATALO
and.b #0x40, DATALO
add.b DATALO, DATALO
or.b DATALO, BITMASK
move.w BITMASK, (DST)+
dbf.w HCOUNT, gryscanloop
movm.l (%sp)+, #0x5CC8
rts
.global clrUpdateHiresScanline
clrUpdateHiresScanline:
movm.l #0x133A, -(%sp)
move.l (28+4)(%sp), SRC
move.l (28+12)(%sp), CACHE
move.l (SRC)+, BITMASK
cmp.l (CACHE)+, BITMASK
bne clrcachedirty
move.l (SRC)+, BITMASK
cmp.l (CACHE)+, BITMASK
bne clrcachedirty
move.l (SRC)+, BITMASK
cmp.l (CACHE)+, BITMASK
bne clrcachedirty
move.l (SRC)+, BITMASK
cmp.l (CACHE)+, BITMASK
bne clrcachedirty
move.l (SRC)+, BITMASK
cmp.l (CACHE)+, BITMASK
bne clrcachedirty
move.l (SRC)+, BITMASK
cmp.l (CACHE)+, BITMASK
bne clrcachedirty
move.l (SRC)+, BITMASK
cmp.l (CACHE)+, BITMASK
bne clrcachedirty
move.l (SRC)+, BITMASK
cmp.l (CACHE)+, BITMASK
bne clrcachedirty
move.l (SRC)+, BITMASK
cmp.l (CACHE)+, BITMASK
bne clrcachedirty
move.l (SRC)+, BITMASK
cmp.l (CACHE)+, BITMASK
beq clrscanexit
clrcachedirty:
move.l (28+4)(%sp), SRC
move.l (28+8)(%sp), DST
move.l (28+12)(%sp), CACHE
clr.w DATA
clr.w MSBOFFSET
lea pixEven@END.w(%a5), PIXPAIREVENTABLE
lea pixOdd@END.w(%a5), PIXPAIRODDTABLE
move.w #18, HCOUNT
move.w (SRC)+, BITMASK
move.w BITMASK, (CACHE)+
ror.w #8, BITMASK
add.b BITMASK, BITMASK
scs.b MSBOFFSET
and.b #16, MSBOFFSET
clrscanloop:
lea (PIXPAIREVENTABLE,MSBOFFSET.w), PIXPAIR
move.b BITMASK, DATA
and.b #0x0F, DATA
move.b (PIXPAIR,DATA.w), (DST)+
lsr.w #2, BITMASK
move.b BITMASK, DATA
and.b #0x0F, DATA
move.b (PIXPAIR,DATA.w), (DST)+
lsr.w #2, BITMASK
move.b BITMASK, DATA
and.b #0x0F, DATA
move.b (PIXPAIR,DATA.w), (DST)+
lsr.w #2, BITMASK
move.b BITMASK, DATA
and.b #0x0F, DATA
btst #9, BITMASK
sne.b MSBOFFSET
and.b #16, MSBOFFSET
add.w MSBOFFSET, DATA
add.w MSBOFFSET, DATA
move.b 32(PIXPAIR,DATA.w), (DST)+
lea (PIXPAIRODDTABLE,MSBOFFSET.w), PIXPAIR
lsr.w #1, BITMASK
move.b BITMASK, DATA
and.b #0x0F, DATA
move.b (PIXPAIR,DATA.w), (DST)+
lsr.w #2, BITMASK
move.b BITMASK, DATA
and.b #0x0F, DATA
move.b (PIXPAIR,DATA.w), (DST)+
lsr.w #2, BITMASK
move.b BITMASK, DATA
and.b #0x0F, DATA
move.b (PIXPAIR,DATA.w), (DST)+
lsr.w #2, BITMASK
move.w (SRC)+, PREFETCH
move.w PREFETCH, (CACHE)+
ror.w #8, PREFETCH
add.b PREFETCH, PREFETCH
scs.b MSBOFFSET
and.b #16, MSBOFFSET
move.b PREFETCH, DATA
add.b DATA, DATA
and.b #0x0C, DATA
and.b #0x03, BITMASK
or.b BITMASK, DATA
add.w MSBOFFSET, DATA
add.w MSBOFFSET, DATA
move.b 32(PIXPAIR,DATA.w), (DST)+
lsr.b #1, BITMASK
and.w #1, BITMASK
or.w PREFETCH, BITMASK
dbf.w HCOUNT, clrscanloop
/*
* Last byte doesn't require prefetch.
*/
clrlastword:
lea (PIXPAIREVENTABLE,MSBOFFSET.w), PIXPAIR
move.b BITMASK, DATA
and.b #0x0F, DATA
move.b (PIXPAIR,DATA.w), (DST)+
lsr.w #2, BITMASK
move.b BITMASK, DATA
and.b #0x0F, DATA
move.b (PIXPAIR,DATA.w), (DST)+
lsr.w #2, BITMASK
move.b BITMASK, DATA
and.b #0x0F, DATA
move.b (PIXPAIR,DATA.w), (DST)+
lsr.w #2, BITMASK
move.b BITMASK, DATA
and.b #0x0F, DATA
btst #9, BITMASK
sne.b MSBOFFSET
and.b #16, MSBOFFSET
add.w MSBOFFSET, DATA
add.w MSBOFFSET, DATA
move.b 32(PIXPAIR,DATA.w), (DST)+
lea (PIXPAIRODDTABLE,MSBOFFSET.w), PIXPAIR
lsr.w #1, BITMASK
move.b BITMASK, DATA
and.b #0x0F, DATA
move.b (PIXPAIR,DATA.w), (DST)+
lsr.w #2, BITMASK
move.b BITMASK, DATA
and.b #0x0F, DATA
move.b (PIXPAIR,DATA.w), (DST)+
lsr.w #2, BITMASK
move.b BITMASK, DATA
and.b #0x0F, DATA
move.b (PIXPAIR,DATA.w), (DST)+
lsr.w #2, BITMASK
and.b #0x03, BITMASK
add.w MSBOFFSET, BITMASK
add.w MSBOFFSET, BITMASK
move.b 32(PIXPAIR,BITMASK.w), (DST)
clrscanexit:
movm.l (%sp)+, #0x5CC8
rts
.global hrclrUpdateHiresScanline
hrclrUpdateHiresScanline:
movm.l #0x133A, -(%sp)
move.l (28+4)(%sp), SRC
move.l (28+12)(%sp), CACHE
move.l (SRC)+, BITMASK
cmp.l (CACHE)+, BITMASK
bne hrcachedirty
move.l (SRC)+, BITMASK
cmp.l (CACHE)+, BITMASK
bne hrcachedirty
move.l (SRC)+, BITMASK
cmp.l (CACHE)+, BITMASK
bne hrcachedirty
move.l (SRC)+, BITMASK
cmp.l (CACHE)+, BITMASK
bne hrcachedirty
move.l (SRC)+, BITMASK
cmp.l (CACHE)+, BITMASK
bne hrcachedirty
move.l (SRC)+, BITMASK
cmp.l (CACHE)+, BITMASK
bne hrcachedirty
move.l (SRC)+, BITMASK
cmp.l (CACHE)+, BITMASK
bne hrcachedirty
move.l (SRC)+, BITMASK
cmp.l (CACHE)+, BITMASK
bne hrcachedirty
move.l (SRC)+, BITMASK
cmp.l (CACHE)+, BITMASK
bne hrcachedirty
move.l (SRC)+, BITMASK
cmp.l (CACHE)+, BITMASK
beq hrscanexit
hrcachedirty:
move.l (28+4)(%sp), SRC
move.l (28+8)(%sp), DST
move.l (28+12)(%sp), CACHE
clr.w DATA
clr.w MSBOFFSET
lea pixPairEven@END.w(%a5), PIXPAIREVENTABLE
lea pixPairOdd@END.w(%a5), PIXPAIRODDTABLE
move.w #18, HCOUNT
move.w (SRC)+, BITMASK
move.w BITMASK, (CACHE)+
ror.w #8, BITMASK
add.b BITMASK, BITMASK
scs.b MSBOFFSET
and.b #32, MSBOFFSET
hrscanloop:
lea (PIXPAIREVENTABLE,MSBOFFSET.w), PIXPAIR
move.b BITMASK, DATA
and.b #0x0F, DATA
add.b DATA, DATA
move.w (PIXPAIR,DATA.w), (DST)+
lsr.w #1, BITMASK
move.b BITMASK, DATA
and.b #0x1E, DATA
move.w (PIXPAIR,DATA.w), (DST)+
lsr.w #2, BITMASK
move.b BITMASK, DATA
and.b #0x1E, DATA
move.w (PIXPAIR,DATA.w), (DST)+
lsr.w #3, BITMASK
move.b BITMASK, DATA
and.b #0x0F, DATA
btst #9, BITMASK
sne.b MSBOFFSET
and.b #32, MSBOFFSET
add.w MSBOFFSET, DATA
add.w DATA, DATA
move.w 64(PIXPAIR,DATA.w), (DST)+
lea (PIXPAIRODDTABLE,MSBOFFSET.w), PIXPAIR
move.b BITMASK, DATA
and.b #0x1E, DATA
move.w (PIXPAIR,DATA.w), (DST)+
lsr.w #2, BITMASK
move.b BITMASK, DATA
and.b #0x1E, DATA
move.w (PIXPAIR,DATA.w), (DST)+
lsr.w #2, BITMASK
move.b BITMASK, DATA
and.b #0x1E, DATA
move.w (PIXPAIR,DATA.w), (DST)+
lsr.w #3, BITMASK
move.w (SRC)+, PREFETCH
move.w PREFETCH, (CACHE)+
ror.w #8, PREFETCH
add.b PREFETCH, PREFETCH
scs.b MSBOFFSET
and.b #32, MSBOFFSET
move.b PREFETCH, DATA
add.b DATA, DATA
and.b #0x0C, DATA
and.b #0x03, BITMASK
or.b BITMASK, DATA
add.w MSBOFFSET, DATA
add.w DATA, DATA
move.w 64(PIXPAIR,DATA.w), (DST)+
lsr.b #1, BITMASK
and.w #1, BITMASK
or.w PREFETCH, BITMASK
dbf.w HCOUNT, hrscanloop
/*
* Last byte doesn't require prefetch.
*/
hrlastword:
lea (PIXPAIREVENTABLE,MSBOFFSET.w), PIXPAIR
move.b BITMASK, DATA
and.b #0x0F, DATA
add.b DATA, DATA
move.w (PIXPAIR,DATA.w), (DST)+
lsr.w #1, BITMASK
move.b BITMASK, DATA
and.b #0x1E, DATA
move.w (PIXPAIR,DATA.w), (DST)+
lsr.w #2, BITMASK
move.b BITMASK, DATA
and.b #0x1E, DATA
move.w (PIXPAIR,DATA.w), (DST)+
lsr.w #3, BITMASK
move.b BITMASK, DATA
and.b #0x0F, DATA
btst #9, BITMASK
sne.b MSBOFFSET
and.b #32, MSBOFFSET
add.w MSBOFFSET, DATA
add.w DATA, DATA
move.w 64(PIXPAIR,DATA.w), (DST)+
lea (PIXPAIRODDTABLE,MSBOFFSET.w), PIXPAIR
move.b BITMASK, DATA
and.b #0x1E, DATA
move.w (PIXPAIR,DATA.w), (DST)+
lsr.w #2, BITMASK
move.b BITMASK, DATA
and.b #0x1E, DATA
move.w (PIXPAIR,DATA.w), (DST)+
lsr.w #2, BITMASK
move.b BITMASK, DATA
and.b #0x1E, DATA
move.w (PIXPAIR,DATA.w), (DST)+
lsr.w #3, BITMASK
and.b #0x03, BITMASK
add.w MSBOFFSET, BITMASK
add.w BITMASK, BITMASK
move.w 64(PIXPAIR,BITMASK.w), (DST)
hrscanexit:
movm.l (%sp)+, #0x5CC8
rts
/*
* Render double height scanline.
*/
.global hrclrUpdateHiresDblScanline
hrclrUpdateHiresDblScanline:
movm.l #0x133A, -(%sp)
move.l (28+4)(%sp), SRC
move.l (28+12)(%sp), CACHE
move.l (SRC)+, BITMASK
cmp.l (CACHE)+, BITMASK
bne hrcachedirtydbl
move.l (SRC)+, BITMASK
cmp.l (CACHE)+, BITMASK
bne hrcachedirtydbl
move.l (SRC)+, BITMASK
cmp.l (CACHE)+, BITMASK
bne hrcachedirtydbl
move.l (SRC)+, BITMASK
cmp.l (CACHE)+, BITMASK
bne hrcachedirtydbl
move.l (SRC)+, BITMASK
cmp.l (CACHE)+, BITMASK
bne hrcachedirtydbl
move.l (SRC)+, BITMASK
cmp.l (CACHE)+, BITMASK
bne hrcachedirtydbl
move.l (SRC)+, BITMASK
cmp.l (CACHE)+, BITMASK
bne hrcachedirtydbl
move.l (SRC)+, BITMASK
cmp.l (CACHE)+, BITMASK
bne hrcachedirtydbl
move.l (SRC)+, BITMASK
cmp.l (CACHE)+, BITMASK
bne hrcachedirtydbl
move.l (SRC)+, BITMASK
cmp.l (CACHE)+, BITMASK
beq hrscanexitdbl
hrcachedirtydbl:
move.l (28+4)(%sp), SRC
move.l (28+12)(%sp), CACHE
move.l (SRC)+, (CACHE)+
move.l (SRC)+, (CACHE)+
move.l (SRC)+, (CACHE)+
move.l (SRC)+, (CACHE)+
move.l (SRC)+, (CACHE)+
move.l (SRC)+, (CACHE)+
move.l (SRC)+, (CACHE)+
move.l (SRC)+, (CACHE)+
move.l (SRC)+, (CACHE)+
move.l (SRC)+, (CACHE)+
move.l (28+4)(%sp), SRC
move.l (28+8)(%sp), DST
move.l DST, DSTDBL
add.l #320, DSTDBL
clr.w DATA
clr.w MSBOFFSET
lea pixPairEven@END.w(%a5), PIXPAIREVENTABLE
lea pixPairOdd@END.w(%a5), PIXPAIRODDTABLE
move.w #18, HCOUNT
move.w (SRC)+, BITMASK
ror.w #8, BITMASK
add.b BITMASK, BITMASK
scs.b MSBOFFSET
and.b #32, MSBOFFSET
hrscanloopdbl:
lea (PIXPAIREVENTABLE,MSBOFFSET.w), PIXPAIR
move.b BITMASK, DATA
and.w #0x0F, DATA
add.b DATA, DATA
move.w (PIXPAIR,DATA.w), DATA
move.w DATA, (DST)+
move.w DATA, (DSTDBL)+
lsr.w #1, BITMASK
move.b BITMASK, DATA
and.w #0x1E, DATA
move.w (PIXPAIR,DATA.w), DATA
move.w DATA, (DST)+
move.w DATA, (DSTDBL)+
lsr.w #2, BITMASK
move.b BITMASK, DATA
and.w #0x1E, DATA
move.w (PIXPAIR,DATA.w), DATA
move.w DATA, (DST)+
move.w DATA, (DSTDBL)+
lsr.w #3, BITMASK
move.b BITMASK, DATA
and.w #0x0F, DATA
btst #9, BITMASK
sne.b MSBOFFSET
and.b #32, MSBOFFSET
add.w MSBOFFSET, DATA
add.w DATA, DATA
move.w 64(PIXPAIR,DATA.w), DATA
move.w DATA, (DST)+
move.w DATA, (DSTDBL)+
lea (PIXPAIRODDTABLE,MSBOFFSET.w), PIXPAIR
move.b BITMASK, DATA
and.w #0x1E, DATA
move.w (PIXPAIR,DATA.w), DATA
move.w DATA, (DST)+
move.w DATA, (DSTDBL)+
lsr.w #2, BITMASK
move.b BITMASK, DATA
and.w #0x1E, DATA
move.w (PIXPAIR,DATA.w), DATA
move.w DATA, (DST)+
move.w DATA, (DSTDBL)+
lsr.w #2, BITMASK
move.b BITMASK, DATA
and.w #0x1E, DATA
move.w (PIXPAIR,DATA.w), DATA
move.w DATA, (DST)+
move.w DATA, (DSTDBL)+
lsr.w #3, BITMASK
move.w (SRC)+, PREFETCH
ror.w #8, PREFETCH
add.b PREFETCH, PREFETCH
scs.b MSBOFFSET
and.b #32, MSBOFFSET
move.b PREFETCH, DATA
and.w #0x06, DATA
add.b DATA, DATA
and.b #0x03, BITMASK
or.b BITMASK, DATA
add.w MSBOFFSET, DATA
add.w DATA, DATA
move.w 64(PIXPAIR,DATA.w), DATA
move.w DATA, (DST)+
move.w DATA, (DSTDBL)+
lsr.b #1, BITMASK
and.w #1, BITMASK
or.w PREFETCH, BITMASK
dbf.w HCOUNT, hrscanloopdbl
/*
* Last byte doesn't require prefetch.
*/
hrlastworddbl:
lea (PIXPAIREVENTABLE,MSBOFFSET.w), PIXPAIR
move.b BITMASK, DATA
and.w #0x0F, DATA
add.b DATA, DATA
move.w (PIXPAIR,DATA.w), DATA
move.w DATA, (DST)+
move.w DATA, (DSTDBL)+
lsr.w #1, BITMASK
move.b BITMASK, DATA
and.w #0x1E, DATA
move.w (PIXPAIR,DATA.w), DATA
move.w DATA, (DST)+
move.w DATA, (DSTDBL)+
lsr.w #2, BITMASK
move.b BITMASK, DATA
and.w #0x1E, DATA
move.w (PIXPAIR,DATA.w), DATA
move.w DATA, (DST)+
move.w DATA, (DSTDBL)+
lsr.w #3, BITMASK
move.b BITMASK, DATA
and.w #0x0F, DATA
btst #9, BITMASK
sne.b MSBOFFSET
and.b #32, MSBOFFSET
add.w MSBOFFSET, DATA
add.w DATA, DATA
move.w 64(PIXPAIR,DATA.w), DATA
move.w DATA, (DST)+
move.w DATA, (DSTDBL)+
lea (PIXPAIRODDTABLE,MSBOFFSET.w), PIXPAIR
move.b BITMASK, DATA
and.w #0x1E, DATA
move.w (PIXPAIR,DATA.w), DATA
move.w DATA, (DST)+
move.w DATA, (DSTDBL)+
lsr.w #2, BITMASK
move.b BITMASK, DATA
and.w #0x1E, DATA
move.w (PIXPAIR,DATA.w), DATA
move.w DATA, (DST)+
move.w DATA, (DSTDBL)+
lsr.w #2, BITMASK
move.b BITMASK, DATA
and.w #0x1E, DATA
move.w (PIXPAIR,DATA.w), DATA
move.w DATA, (DST)+
move.w DATA, (DSTDBL)+
lsr.w #3, BITMASK
and.b #0x03, BITMASK
add.w MSBOFFSET, BITMASK
add.w BITMASK, BITMASK
move.w 64(PIXPAIR,BITMASK.w), DATA
move.w DATA, (DST)
move.w DATA, (DSTDBL)
hrscanexitdbl:
movm.l (%sp)+, #0x5CC8
rts
/*
* Update a row of text.
*/
.global gryUpdateTextRow
gryUpdateTextRow:
movm.l #0x1F3A, -(%sp)
move.l (36+4)(%sp), SRC
move.l (36+8)(%sp), DST
move.l (36+12)(%sp), CACHE
move.w #39, HCOUNT
grycharloop:
clr.w DATA
move.b (SRC)+, DATA
cmp.b (CACHE), DATA
beq.b gryskipchar
move.b DATA, (CACHE)+
move.w DATA, BITMASK
lsl.w #2, DATA
lsl.w #1, BITMASK
add.w BITMASK, DATA
move.l AppleFont@END.w(%a5), FONT
add.w DATA, FONT
move.w #5, VCOUNT
grycharscanloop:
move.b (FONT)+, (DST)
add.w #40, DST
dbf.w VCOUNT, grycharscanloop
sub.w #(40*6-1), DST
dbf.w HCOUNT, grycharloop
movm.l (%sp)+, #0x5CF8
rts
gryskipchar:
addq.l #1, CACHE
addq.l #1, DST
dbf.w HCOUNT, grycharloop
movm.l (%sp)+, #0x5CF8
rts
.global clrUpdateTextRow
clrUpdateTextRow:
movm.l #0x1F3A, -(%sp)
move.l (36+4)(%sp), SRC
move.l (36+8)(%sp), DST
move.l (36+12)(%sp), CACHE
move.w #39, HCOUNT
charloop:
clr.w DATA
move.b (SRC)+, DATA
cmp.b (CACHE), DATA
beq.b skipchar
move.b DATA, (CACHE)+
move.w DATA, BITMASK
lsl.w #2, DATA
lsl.w #1, BITMASK
add.w BITMASK, DATA
move.l AppleFont@END.w(%a5), FONT
add.w DATA, FONT
move.w #5, VCOUNT
charscanloop:
move.b (FONT)+, BITMASK
lsl.b #4, BITMASK
add.b BITMASK, BITMASK
scs.b DATA
lsl.w #8, DATA
add.b BITMASK, BITMASK
scs.b DATA
move.w DATA, (DST)+
add.b BITMASK, BITMASK
scs.b DATA
lsl.w #8, DATA
add.b BITMASK, BITMASK
scs.b DATA
move.w DATA, (DST)
add.w #(160-2), DST
dbf.w VCOUNT, charscanloop
sub.w #(160*6-4), DST
dbf.w HCOUNT, charloop
movm.l (%sp)+, #0x5CF8
rts
skipchar:
addq.l #1, CACHE
addq.l #4, DST
dbf.w HCOUNT, charloop
movm.l (%sp)+, #0x5CF8
rts
.global hrclrUpdateTextRow
hrclrUpdateTextRow:
movm.l #0x1F3A, -(%sp)
move.l (36+4)(%sp), SRC
move.l (36+8)(%sp), DST
move.l (36+12)(%sp), CACHE
move.w #39, HCOUNT
hrcharloop:
move.b (SRC), DATA
cmp.b (CACHE), DATA
beq.b hrskipchar
move.b DATA, (CACHE)+
and.b #0xC0, DATA
sne.b BITMASK
move.b BITMASK, DATA
lsl.w #8, DATA
move.b BITMASK, DATA
move.w DATA, (DST)+
move.w DATA, (DST)+
move.w DATA, (DST)+
move.w DATA, (DST)
clr.w DATA
move.b (SRC)+, DATA
lsl.w #3, DATA
move.l AppleFont@END.w(%a5), FONT
add.w DATA, FONT
move.w #7, VCOUNT
hrcharscanloop:
add.w #(320-6), DST
move.b (FONT)+, BITMASK
add.b BITMASK, BITMASK
scs.b DATA
lsl.w #8, DATA
add.b BITMASK, BITMASK
scs.b DATA
move.w DATA, (DST)+
add.b BITMASK, BITMASK
scs.b DATA
lsl.w #8, DATA
add.b BITMASK, BITMASK
scs.b DATA
move.w DATA, (DST)+
add.b BITMASK, BITMASK
scs.b DATA
lsl.w #8, DATA
add.b BITMASK, BITMASK
scs.b DATA
move.w DATA, (DST)+
add.b BITMASK, BITMASK
scs.b DATA
lsl.w #8, DATA
add.b BITMASK, BITMASK
scs.b DATA
move.w DATA, (DST)
dbf.w VCOUNT, hrcharscanloop
sub.w #(320*8-2), DST
dbf.w HCOUNT, hrcharloop
movm.l (%sp)+, #0x5CF8
rts
hrskipchar:
addq.l #1, SRC
addq.l #1, CACHE
addq.l #8, DST
dbf.w HCOUNT, hrcharloop
movm.l (%sp)+, #0x5CF8
rts
.global hrclrUpdateDblTextRow
hrclrUpdateDblTextRow:
movm.l #0x1F3A, -(%sp)
move.l (36+4)(%sp), SRC
move.l (36+8)(%sp), DST
move.l (36+12)(%sp), CACHE
move.w #39, HCOUNT
dblcharloop:
move.b (SRC), DATA
cmp.b (CACHE), DATA
beq.b skipdblchar
move.b DATA, (CACHE)+
and.b #0xC0, DATA
sne.b BITMASK
move.b BITMASK, DATA
lsl.w #8, DATA
move.b BITMASK, DATA
move.w DATA, (DST)+
move.w DATA, (DST)
addq.l #6, DST
clr.w DATA
move.b (SRC)+, DATA
lsl.w #3, DATA
move.l AppleFont@END.w(%a5), FONT
add.w DATA, FONT
move.w #7, VCOUNT
dblcharscanloop:
add.w #(320-8), DST
move.b (FONT)+, BITMASK
not.b BITMASK
move.b BITMASK, DATA
and.b #0x83, DATA
seq.b (DST)+
move.b BITMASK, DATA
and.b #0x40, DATA
seq.b (DST)+
move.b BITMASK, DATA
and.b #0x38, DATA
seq.b (DST)+
move.b BITMASK, DATA
and.b #0x04, DATA
seq.b (DST)
addq.l #5, DST
dbf.w VCOUNT, dblcharscanloop
sub.w #(320*8), DST
dbf.w HCOUNT, dblcharloop
movm.l (%sp)+, #0x5CF8
rts
skipdblchar:
addq.l #1, SRC
addq.l #1, CACHE
addq.l #8, DST
dbf.w HCOUNT, dblcharloop
movm.l (%sp)+, #0x5CF8
rts
/*
* Update a row of lores blocks.
*/
.global hrclrUpdateLoresRow
hrclrUpdateLoresRow:
movm.l #0x1F3A, -(%sp)
move.l (36+4)(%sp), SRC
move.l (36+8)(%sp), DST
move.l (36+12)(%sp), CACHE
lea clr16@END.w(%a5), CLR16BASE
move.w #39, HCOUNT
blockloop:
move.b (SRC), DATA
cmp.b (CACHE), DATA
beq.b skipblock
move.b DATA, (CACHE)+
andi.w #0x0F, DATA
move.b (CLR16BASE,DATA.w), DATA
move.b DATA, BITMASK
lsl.w #8, DATA
move.b BITMASK, DATA
move.w DATA, BITMASK
swap DATA
move.w BITMASK, DATA
move.w #4, VCOUNT
blockscantoploop:
move.l DATA, (DST)+
move.l DATA, (DST)+
add.w #(320-8), DST
dbf.w VCOUNT, blockscantoploop
clr.w DATA
move.b (SRC)+, DATA
lsr.b #4, DATA
move.b (CLR16BASE,DATA.w), DATA
move.b DATA, BITMASK
lsl.w #8, DATA
move.b BITMASK, DATA
move.w DATA, BITMASK
swap DATA
move.w BITMASK, DATA
move.w #3, VCOUNT
blockscanbottomloop:
move.l DATA, (DST)+
move.l DATA, (DST)+
add.w #(320-8), DST
dbf.w VCOUNT, blockscanbottomloop
sub.w #(320*9-8), DST
dbf.w HCOUNT, blockloop
movm.l (%sp)+, #0x5CF8
rts
skipblock:
addq.l #1, SRC
addq.l #1, CACHE
addq.l #8, DST
dbf.w HCOUNT, blockloop
movm.l (%sp)+, #0x5CF8
rts
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